Check valves for sewage: photo, device, installation, reviews. Check valve for sewerage by own hands

Owners of apartments on the first floors often encounter problems when sewage drains flood the dwelling. The fluid from the system quickly spreads through the premises and causes material damage. In order to exclude such trouble, you can use a non-return valve to the sewer. These devices prevent the return of drains to the apartment. However, before acquiring such a product, it is important to know in detail the features of the installation work.

Feedback on the use of the valve

Users believe that for normal operation of the system, it is necessary that sewage flows through the pipeline at a certain rate. The movement is provided by a slope, which must be laid when the system is arranged. If it has decreased as a result of subsidence of the basement or was initially insufficient, the rate of movement of the drains during operation may slow down. Here lies the main cause of the obstruction of sewerage, which is expressed in the wrong slope of the outflow pipes. In this case, large solid particles will settle on the walls, since the force of water movement can not affect them with the intensity that would be sufficient to move the mass. At some point in time, the deposits will block the pipe clearance.

Use when the system is not installed correctly

As users emphasize, the same thing happens when the slope is too steep, while water does not manage to cope with the waste. Check valves for sewage can be needed in the event that the pipeline was worn out. This occurs when the system is operated for a long time, within which deposits form. The lumen will be less and less inside, and if the flow velocity is normal, the large-fraction elements will be fixed on the walls. Gradually they accumulate, they acquire hardness and form clogs. Home masters note that the need to install the described element may be required in the event that the horizontal bends are installed at a right angle. These nodes change the configuration of the pipeline, as a result of which the rate of movement of the drains is lost. Regardless of whether it slows down or accelerates, this negatively affects the operation of the system, which causes the formation of clogging.

Installation Recommendations

Check valves for sewage are installed by a certain technology. Before you start the installation work, you need to determine where the site will be located, and it is important to consider providing free access to it for maintenance and cleaning. Choosing the model of the device, it is necessary to be guided not by low cost, but qualitative characteristics, as the cost of the valve can not be compared with the cost of repairing the apartment, when it will flood with drains. The master should pay attention to the technology of equipment installation.

Most often these devices are universal, but on sale you can find models that are only for vertical or horizontal installation. Check valves for sewage before installation work are checked for leaks. For installation, cut out the required size in the pipeline, and then pipe into the valve. If the sewage system is made on the basis of cast iron, then it is necessary to install an adapter from metal to plastic. The element is mounted in accordance with the direction of movement of the liquid. Each unit has an arrow that indicates this direction. It should be directed towards the collector.

Methods of work

Check valve for sewage, photo of which you can consider in the article, can be installed on a separate equipment or on the whole sewerage system. In the first case it is a sink or toilet bowl. If you have a lifting valve, then it is installed exclusively on the horizontal section of the sewage system. Before starting work, you need to pick up equipment. The choice should be based on the characteristics of the system, for example, the volume of wastewater. Among other things, you need to choose a device, given the location of the device, it can be the entire system or a separate unit.

Before installing the non-return valve on the sewer, you need to select a location in front of the common sewer riser. If the work is done on the existing system, then in a certain place a certain section is cut from it, which will correspond to the dimensions of the valve. If the entire sewage system is arranged, then the equipment is installed in the required location. The next step is to check the tightness of the device.

Installation of the return vent valve on the sewer

A non-return valve for PVC canalization can be designed to combat extraneous noise and unpleasant odors. Such a device is called an aeration valve and is installed on the principle of a fitting. Initially, the master must choose a location for installation, which will depend on whether aeration is necessary for the entire sewage system or for a separate unit. In the latter case, the valve is installed with a deviation of 30 centimeters from the gravity pipe. From the nearest siphon, the element must be removed by 20 centimeters.

Nuances

In the first case, the products are mounted in a specially allocated room or in an attic. Installation of a non-return valve to the sewer is carried out according to the principle of fixing to the pipe with the help of a fitting or thread. At the final stage, you need to analyze how much of the device's joints with the pipes are hermetic.

For reference

In order to ensure correct operation of the device, it is important to guarantee the air temperature, which should not be less than 0 degrees.

The device of the return valve

The non-return valve plastic for the sewage system has certain design features. On sale you can find devices of this type, which consist of a body made in the form of a piece of pipe. Inside there is a locking plate, which is equipped with a rubber seal. A spring made of stainless steel is fixed to it. The valve body has a removable cover that allows cleaning from the inside, which may be necessary for contamination. On the body there is a lever with which you can open or close the valve manually. If it is in the closed position, the locking plate is stationary and at the same time it does not let the drains pass. If it is open, then sewage passes through it. The drains leave the apartment, rushing to the sewer riser and raising the lock plate. Once the sink has been completed, the plate returns to its place under the influence of the spring. If there is a reverse sewage current, then this element will not let them into the dwelling.

What else you need to know about the design features?

The plate has a diameter that is greater than the corresponding value of the stop, this ensures the reliability of the throat of the valve. If you are interested in the installation of a non-return valve for sewage, you can consider another version of it, which has a smaller diameter. With such a device, the level of the outlet and inlet nozzle will be different. Between these two elements is air, which presses on the membrane of the outlet branch pipe, this occurs with the reverse current of water. The membrane is necessary for closing the branch pipe, which eliminates the flow of water in the opposite direction.

Is it possible to manufacture the valve by yourself?

A check valve for sewerage by one's own hands is quite possible to install independently, but it is beyond the power of a specialist to make such a mechanism. Similar nodes are performed in the plant conditions using special technology and equipment. For example, the simplest model has a diaphragm valve, a lever and a removable cover. The last element is necessary for cleaning the device when it clogs. If you still decide to start making, then in the process of work you can use brass, bronze, stainless steel, cast iron, as well as plastic.

The wafer-type valve can be manufactured on the basis of a membrane, which is represented by a disk. A spring can be used instead of the lever. If you decide to perform a two-leaf valve, the membrane should be made from two flaps. In the presence of a small-diameter sewer pipe, a ball valve can be made that has a ball-shaped membrane and a spring-spring. This version of the device is considered the most reliable and widespread. In order to make a replacement or maintenance of the device, the valve will need to be dismantled, and the master will not face special difficulties, since its installation is done with two bolts.

Feedback on the check valve

A non-return valve for sewerage, which you can read below, can be used for external and internal sewage systems. According to users, it is not recommended to manufacture this unit, since improper operation of the device can negatively affect the functioning of the entire sewerage system. Buyers argue that high-quality valves have mechanical strength, reliable connection to the main highway, as well as resistance to corrosive environments.

Mechanical strength is extremely important for the reason that the entire ground section and the surface of the valve will be affected by the external pressure of the soil. This is relevant for units designed for external sewage systems. But the resistance to aggressive environment should have valves for external and internal systems.

Buyers argue that it is important to install and aeration valve, which will prevent the passage of unpleasant odors through the internal wiring. If you do not want to hear extraneous sounds that occur in plumbing fixtures, then a non-return valve must be installed.